We just got back from a week on Voyager of the Seas. Not sure if it's the same, but we really enjoyed the room service. All the food, juice, & coffee are free!
For breakfast, they have everything from continental breads/pastries, fruit plates, to amazing omelettes. Try the ham and cheese omelette. Scrambled eggs are no good anywhere on the ship- I don't think they use real eggs.
We would use room service as our alarm clock. They have menu sheets you can order from that you hang on your door knob 3am the night before. You fill in when you want them to deliver your breakfast in the morning and voila!
Also- tip these people at the time of service. Just a buck or two will do. Have fun!